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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '563942b4b182acbd587dacac3570478dca12a0ca21969b54422de2bebb930856' 
  AND token = 'M3Weh96Cm2tf/9Rc2+ukep+kz02CtpR+nNlByscbQ3k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}